Tractor attachment



Nov. 19, 1940. J. 1.. HIPPLE TRACTOR ATTACHMENT Filed April 17, 1937 3SheetsSheet 1 mm m g Q. S

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TRACTOR ATTACHMENT Filed April 17, 1937 3 Sheets-Sheet 2 InventorJaysllfifip ale 1 1940- J. L. HIPPLE TRACTOR ATTACHMENT Filed April 17,1937 3 Sheets-Sheet 3 w r. P ww t M L Q 31 q mLw/A mm 5% Q g g I m N: QE on k N: J/

cm 0 o r v I w D m LR EL Q no o O O mm 2.1 we Q on 2 a? Q. a $2 an m E MK-N \mn 0 0 0 0 0 v 0 0 r on w r o If N fin g m. mm n n 5 2%. Wm 3 on mmmm g mm 5w mo m NH ow e N E Patented Nov. 19, 1940 UNITED STATES TRACTORATTACHMENT James L. Hippie, Canton, 11]., assignor to InternationalHarvester Company, a corporation oi New Jersey Application April 17,1937;8erial No. 137,466

9 Claims.

This invention relates to farm implements and more particularly to theclass of implements adapted for attachment to, and operation inconjunction with, tractors.

The principal object of the invention is to provide means for convertingfarm tractor implements of the general purpose type into eflicienttractor planters when desired, to produce a tractor planter structure inwhich the planter units will be positioned to the rear of the tractorand in which a part of the planter structure may be mounted with thetractor draw-bar as a vertical support.

Another object of the invention is to provide a multiple tractor planterstructure that is readily converted from a planter adapted to plant,say, two rows at a time to one for planting three or four rows, or viceversa, by adding or removing additional seed hopper devices and theirassociated drive means.

Another object of the invention is to provide a planter arrangement inwhich seed hoppers may be placed at different width row spacinglocations on the hopper supporting structure, and to provide driveshafts thereforadapted to be adjusted in length to drive the hoppers atthe difierent locations.

Another object of the invention is to provide a furrow openingsupporting structure of the tool-bar type which may be raised andlowered by a power lift mechanism, and also to provide working depthadjusting mechanism in combination with the raising and loweringmechanism.

Still another object of the planter attachment is to provide means forconverting the tractor planter into a cultivating attachment.

The foregoing and other minor objects have been attained by theprovision of a structure having for its characteristic features ofconstruction a transverse frame structure attached to the rear .of thetractor, from which the furrow opener units are trailed. The dispensingmechanism for the planter attachment is mounted on a transverselyextending frame structure to the rear of the tractor, and is supportedfrom the drawbar of the tractor. Means have been provided for powerraising and lowering of the furrow opener units, and also means foradjusting the working depth of the furrow opener units.

Mechanism has also been provided to throw the driving mechanism for theplanter dispensing mechanism in and out of operation as the furrowopener units are raised and lowered from ground engaging to transportposition.

The invention accordingly resides in the organization and details ofconstruction or equivalents thereofv hereinafter more particularlydescribed, and then defined in the claims.

Referring to the drawings- Figure l is a plan view showing the planterattachment attached to the rear end of a general purpose tractor of thetricycle type, with several of the hoppers detached to show the drivetherefor;

Figure 21s a side elevation of the planter attachments, as shown inFigure 1, with the left rear wheel removed in order to show theadjusting mechanism for the furrow opener units;

Figure 3 is a perspective view showing the clutch throw-out mechanism;and,

Figure 4 is a rear view of the planter attachment with the hoppersremoved and the planter attachment converted into a cultivatorattachment.

In the present instance, the invention is illustrated as including atractor of the general purpose type having a comparatively narrowlongitudinal body frame In supported on a rear axle housing structure II having depending housings i2 in which are journaled axles to which aremounted wheels I3. The wheels are so positioned as to span two plantrows. The forward end oi the tractor body I0 is supported on a singlecentrally positioned steering truck, not shown. The steering truck issteered in the usual manner by a steering wheel It adjacent theoperator's station ii.

The planting attachment comprises a plurality of planting units l6positioned to the rear of the tractor, as best shown in Figures 1 and 2.In this particular planter attachment there are four planting units,with two of the planting units placed intermediate the rear wheels andto the rear thereof, and two outer units placed laterally oi the rearwheels and to the rear thereof. The four planting units It provide afour row planter attachment, and it is obvious that, if necessary, theouter units may be removed, thus converting the four row planterattachment into a two row planter attachment.

In addition, if necessary, this type 01. planter may be used in themethod of planting known as skip-row planting. In this method, the fourfurrow openers are used to lay out the rows, but only three of thehoppers are used. It is obvious that with this arrangement a twenty-fiveper cent. reduction in acreage may be obtained and that the rows maybe'cultivated the same as if four rows were planted, thus keeping thefields free from weeds. As each of the planter units is similar, onlyone will be described, and like reference characters will denote similarparts.

As best shown in Figures 1 and 2, the tractor has pivotally mounted onthe depending housings l2 a U-shaped draw-bar construction II which issecured at its forward end by draw-bar brackets l8 pivotally mounted onstuds l9. The U- shaped draw-bar I1 is held in its raised position byforwardly extending braces 20 secured at their front ends to thedepending housings l2, and attheir rear ends to supporting brackets 2|mounted on the rear portion of the draw-bar l1. The draw-bar when heldin its raised position by the braces 20, forms a supporting means on thetractor.

A transverse supporting member or bar 22 in the form of a pipe is weldedor otherwise secured to the brackets 2|. The supporting member 22extends laterally beyond the tractor wheels l3 and is mounted on thedraw-bar H to the rear of the wheels. The support 22 is adapted tosupport hopper dispensing mechanisms 23 and their driving mechanisms 24.The hopper dispensing mechanisms 23 are of a well known type andcomprise the hopper and seed plates therefor. The hopper dispensingmechanisms 23 are adapted to be readily attached to and detached fromtheir supports 25, which are mounted on the transverse support 22. Thesupport 25 also comprises a supporting structure for the drive mechanismof each of the hopper dispensing mechanisms. The supporting member 25 ismounted by brackets 26 to supports 21 welded or otherwise secured to themember 22. An intermediate support 21' provides means for attachinghoppers at different locations when changing from one width of rowspacing to another width. As each of the hopper supports 25 is similar,like reference characters will denote similar parts. Each of the hoppers23 is attached to its support 25 by wing nuts and clamp bolts 28.

A transverse drive mechanism 29 extends along the transverse support 22.The transverse drive means 29 comprises a plurality of telescopingshafts 30 and an intermediate shaft 3|. The telescoping shafts 30comprise an inner square shaft 38 and an outer, square, tubular shaft30". The intermediate shaft 3| is connected to the tubular shaft 30".The intermediate shaft has beveled gears 32 mounted thereon for drivingthe intermediate planter units l6. Connected to the outer end of theinner square shaft 30' by coupling members 33 are shafts 34, on whichare mounted bevel gears 35 similar to the gears 32, for driving the seedplates of the outer hoppers 23. The shafts 34 are journaled in thesupport 25. The outer square tubular shafts 30" are detachably mountedat their inner ends to the intermediate shaft 3|, forming a separableextension thereof. It is, therefore, obvious that with this constructionthe outer planter units and the telescoping drive shafts therefor may beremoved, leaving only the intermediate drive shaft for driving theintermediate planting units l5, thus converting a four-row planter drivemechanism into a two-row planter mechanism.

The inner supports 25 for the planter hopper mechanism are supported attheir outer ends on the brackets 2| and at their inner ends to brackets36. Mounted on the rear of the transversely extending support 22 andconnected thereto by brackets 36' are rock-shafts 31 laterally spaced onthe transverse support 22. The rock-shafts 31 are journaled at theirouter ends in the b fikoscillatory movement to the bell cranks 38.

ets 36', and at their inner ends are journaled in the brackets 2|. Therock-shaft 31 may thus have angular or oscillatory movement in thejournal brackets.

Bell cranks 38 are welded, or otherwise secured, to the rock-shafts 31adjacent the supporting; brackets 2|. The bell crank levers 38 comprisean upwardly extending arm 38' and a downwardly extending arm 38" and mayrock to and fro in a vertical plane. the rear axle II is a power liftmechanism 39 of the well known half-revolution clutch type for providingmeans for imparting a reciprocatory or The half-revolution power liftmechanism 39 is attached over an opening to the rear of the differentialmechanism for the rear axle drive shafts 40, and the power liftmechanism is connected to the motor of the tractor through thetransmission of the tractor, so that the power lift mechanism may beoperated while the motor is running and the tractor is standing still.

A transverse rock-shaft 4| is journaled at its outer ends in supportsmounted on the depending housings l2, and has an intermediate support 42on the power lift mechanism 39. A reciprocatory or oscillatory movementis imparted to the rockshaft 4| by means of a crank 43 connected to thehalf-revolution clutch mechanism 33 and to a pitman 44 connecting a.lift arm 45 welded, or otherwise secured, to the rock-shaft 4|. It is,therefore, obvious that, as the power lift mechanism 39 is thrown in andout of operation by a lever 46, and as the crank 43 revolves,reciprocatory motion is imparted to the rock-shaft 4| in successivecycles. U-shaped arms 41 welded, or otherwise secured, to the rock-shaft4| extend rearwardly and upwardly, to which are connected plate-shapedbrackets 48 extending rearwardly. Lifting links 49 pivotally connectedat their forward ends to the brackets 48 extend rearwardly to where theyare pivotally connected to the upper extending arms 38 of the bellcranks 38. It is, therefore, apparent, as the power lift mechanism isoperated to rock the shaft 4|, that movement of the rock-shaft 4| is inturn transmitted to the rock-shafts 31, causing them to be rocked.

A tool bar supporting frame 50 comprising a transverse tool bar support5| is supported from the depending housings l2. Extending forwardly fromthe tool bar support 5| are laterally spaced and longitudinallyextending draft members 52, which are welded or otherwise secured attheir rear ends to the tool bar support 5|. Each draft member 52consists of the longitudinally extending draft member 52, a forwardbrace 52", and a rear brace 52". The rear brace 52" is later- Mounted onthe rear end of ally spaced inwardly and forms a V-shaped structure withthe draft member 52', which is also bent out laterally from its centerline. This construction, as the brace 52" is welded to the tool barsupport 5|, acts to stiffen the tool bar supporting frame construction,so that all the torsional strains on the frame are eliminated. The rearbrace 52" extends forwardly to the midportion of the draft member 52where it is secured. The forward brace 52" is secured to the draftmember 52' at its mid-portion where the rear brace 52" is secured. Thebrace 52 extends inwardly and forwardly, forming a lateral support toprevent torsional strains in the draft member 52. At their forward endsthe draft member 52 and the brace member 52 are journaled on a forwardlyextending Ll-shaped, tubular draft bail 53, which is pivoted onforwardly extending thrust members 54 secured to the depending housingsl2. Split bearings 55 are mounted on the forward ends of the members 52,where the draft members 52 are joumaled on the draft bail 53. Theremovable bearings 55 are used to prevent excessive wear on the draftmembers 52, so that a good contact is maintained between the draftmembers and the draft bail to prevent any loose connections to throw theframe out of line; Each half of the bearing has a radially extending lugportion 55', through which fastening bo1ts55" are disposed to holdbearings in the end of the draft member 52. The enlarged hole in the endof the draft member, which receives the bearing element, permits easyinsertion or removal of the draft member from the U-shaped draft bail. Atie-brace 58 keeps the draft member 52 and the front brace 52" inposition. A collar 51 secured to the draft bail 53 maintains the draftframe in position on the draft bail.

The draft bail is removably attached to the thrust members 54 bydetachable pins 58 and 58'. These pins are attached respectively to thethrust members 54 by a chain 59 to keep the pins from being lost whenthe planter attachment is removed from the tractor. It is obvious that,with this detachable pin construction, the draft bail 53 may be quicklydetached from, or attached to, the tractor.

The draft bail 53, being pivoted on the thrust members 54, may beadjusted vertically in order to maintain the correct line of draft orproper suction for whatever depth the plow bottoms are set. The draftball 53 is adjusted vertically by an adjusting lever 89 extendingrearwardly to within reach of the operator's station l5. The adjustinglever 69, having the usual thumb latch and detent construction, isadjusted about an adjusting quadrant 8|. The adjusting lever 88 issecured to an arm 82, which is secured to a transverse rock-shaft 53.The transverse rockshaft 63 is journaled in supporting brackets 64 inthe form of plates, which are clamped to side walls 65 of the tractorahead of a transmission housing 66. Lifting arms 61 secured to each endof the rock-shaft 63 are pivotally connected to the draft bail 53 bylifting links 68. The lifting links 68 are pivotally connected at theirlower ends to brackets 69 secured to the draft ball 53.

In order to raise and lower the tool bar supporting frame 50, liftingchains 10 are connected to the lower arm 38 of the bell cranks 38. Thelifting chains 18 at their lower ends are connected to lifting arms 1|having a to and fro, or angular, movement in a vertical plane. Thelifting arms 1| are welded, or otherwise secured, to transverserock-shafts 12, which are laterally spaced from each other on oppositesides of the center line of the tractor and are mounted on the tool barsupport 5|. The lifting arms 1| may be said to have an oscillatory,vertical movement about the axis of their respective rockshafts. Therock-shafts 12 are joumaled in upwardly and rearwardly extendingextensions 13 and 14 of the draft member 52' and the rear brace 52",respectively.

Means for adjusting the position of each of the lifting arms 1| in orderto adjust the vertical depth of lister plow bottoms 15, or other groundengaging tools is provided by adjusting levers 18 mounted adjacent thelongitudinally extending body portion ID of the tractor, and just aheadof the rear axle II on the tractor, so that they may be adjusted fromthe operator's station l5. Each of the adjusting levers 16is pivotallymounted at the forward end of the draft members 52. The levers 16 havethe usual thumb latch and detent construction and are adjusted about anadjusting quadrant 11 secured to draft members 52'. The adjusting link18 extends rearwardly from the adjusting lever 18 to where itispivotally connected to an adjusting arm 19 welded, or otherwisesecured, to the rock-shaft 12. As each of the adjusting mechanisms issimilar, only one has been described, and like reference characters havebeen used to denote similar parts. It is apparent that, as the lever 18is adjusted by moving the lever forwardly, the arm 1| will be raised andthe plow bottom 15 will be lowered, thus increasing the depth of plowingor planting. It is also obvious that, as the lever 16 is movedrearwardly, the arm 1| will pivot on the lifting links 10,,causing thelister bottoms 15 to be raised. The arm 1| may be considered as a rigidlink in the chain 10, and by changing the position of the arm or link1|, the length of the entire chain is affected. It is likewise apparentthat the length of the chains 10 may be increased or decreased, causingthe implement frame to be raised or lowered to a given position, andthat, by adjusting the lever. 16, adjustment of the depth may beincreased or decreased from the maximum position.

The lister bottoms 15 are secured to stub beams 88, which are adjustablysecured to the tool bar support 5| by clamps 8|. It is apparent thatvarious row spacings may be obtained by adjusting the stub beams in andout at will.

In the planter attachment, as best shown in Figure 2, a flexible tube 82connects each of the hoppers 23 with. a seed boot 83, which is securedto the stub beam to the rear thereof, and also to the rear of the listerplow bottom 15. It is obvious that, as a furrow is opened by the listerplow bottom 15, seed will be dispensed in the furrow and will be coveredby a disk covering attachment 88, which is trailed to the rear of theseed boot 83 and connected to the stub beam 88 by a bracket 85. Thecovering attachment 84 may be adjusted by an adjusting link 86. A gaugeshoe 88' secured to the lister bottom 15 prevents the plow bottom fromgouging too deeply and acts to maintain a uniform depth of furrow.

As each of the planting units I5 is similar, only the furrow opening"and covering devices of one has been described, and like referencecharacters denote similar parts.

In order to drive the planter dispensing mechanism, a planter drivemechanism 91, as best shown in Figures 2, 3 and 4, has been provided.

A sprocket attachment 88 is attached to the right depending housing l2,and a shaft 89 on the sprocket attachment is secured to the stub axle ofthe right rear wheel in a well known manner.

A jack shaft 90 is joumaled at its outer end, as best shown in Figure 3,in a supporting bracket 9|, and at its inner end is joumaled asupporting bracket 92, which, is secured to a downwardly extendingbracket 92 and is secured to the bottom of the rear axle housing II. A

sprocket 93, as best shown in Figure 3, is loosely mounted on the shaft98 and is driven by a chain 94 from the sprocket 88'. A throw-out clutch95 is slidably mounted on the shaft 90 and is held in engagement withthe clutch portion on the sprocket 93 by a spring 98. A clutch throw-outarm 91 is pivotally supporte by a bracket 98 secured to the bracket 9|.A chain 99 is adjustably connected to an arm I00, as best shown inFigure 2, attached to the U-shaped arm ll. It is obvious that, as thelifting mechanism is operated, the arm I will move vertically, throwingthe clutch mechanism out as the tool bar supporting frame is raised, andpermitting the clutch to engage when the tool bar supporting frame islowered. It is, therefore, obvious that the planter attachment drivemechanism will be 10, stopped when the tool bar supporting frame israised, and will be started when the tool bar supporting frame islowered. A chain tightener IOI is used to tighten the chain 94.

At the inner end of the jack shaft 90 is mounted a sprocket I02 whichdrives, through a chain I03, the intermediate shaft 3I and the adjacenttelescoping shafts 30 which are connected thereto. The chain I03 drivesthe shaft 3!, through a sprocket I04, which is slidably mounted on the 0shaft 3|, forming with clutch members I05 a safety clutch permitting thesprocket I04 to rotate in the event of an over-load, or of clogging ofone of the dispensing mechanisms. A spring I06 normally causes theclutch portion of the 25 sprocket I04 to engage the clutch member of theclutch I05, which is secured to the shaft 3I. The tension on the springI 06 may be adjusted by the adjusting nut I01, and is held in adjustedposition by a pin I08 extending through 30 the shaft 3I. A chaintightener I09, as best shown in Figure 4, takes the slack out of thechain I 03. A shield II 0 prevents the operator from being caught in thechain I03. It is, therefore, obvious from the above description that 5the driving mechanism for the hopper dispensing mechanisms is drivenfrom the rear axle as the tractor and its attached planter moveforwardly; and that the drive mechanism may be thrown in and out ofoperation whenever the power lift mechanism is operated to raise and'lower the tool bar supporting frame. It is also obvious that the drivemechanism has means for preventing breakage of various parts in thedriving mechanism by a simple over-load clutch, 5 which automaticallythrows out whenever an 'over-load is placed upon the hopper drivingmechanism.

In the rear view, as shown in Figure 4, the planter attachment in thisparticular instance 5 is used as a cultivator attachment. When it isused as a cultivator attachment, the dispensing hoppers 23 are removedalong with the stub beams 80 and their attached furrow opening andclosing members, so that the entire planting unit 55 I6 may beconsidered as removed. The drive chain 94 may be detached or thethrow-out clutch 95 locked in the position shown in Figure 4, so that itmay not be operated as the tool bar supporting frame is raised andlowered. In M this particular instance, the stub beams 80 have beenremoved, and knife weeder attachments have been substituted in lieuthereof, making a four row cultivator. The standards for the knifeweeder attachments are of two forms. Outer 65 left standards III arevertical, while adjacent left inner standards II2 have a horizontal anddownwardly extending rear portion. The right inner standards are similarto the left outer standards III, while the outer right standards 70comprise one similar to the standards III and another similar to thestandards II2. By this arrangement, it is. possible to place thecultivator knife plates in staggered relation to one another, so thatthe trash clears each plate and the ad- 76 jacent knife weeders do not'overlap. In this arrangement, the standards for the outer left row andthe inner right row adjacent the center line of the tracwrand one of thestandards for the outer right row are in alignment, while the standardsfor the left inner row and one 5 of the standards for the right outerrow are in alignment with the rear of the previously mentioned standardsIII. Knife weeders H3 and I, having oppositely disposed ends, areconnected to supports II5 provided with an adjustl0 ment for adjustingthe knife weeders angularly. The brackets II 5 are connected to platebrackets I'IG having a complementary adjusting portion to that of thebrackets II5. Each standard III and II! is claimed to the tool barsupport 5| 15 by clamp brackets II'I. Clamp brackets II'I comprise aU-shaped member II 8 slotted, as at I I9, to receive either of thestandards III and H2. A U-shaped clamp portion I is notched to conformto the square tool bar 5|, and its 20 flat surface provides a bearingsurface for the standards III and II2.

A clamp I2I conforming to the tool bar 5| is clamped to the U-shapedmember H8 in the usual manner. With this construction, it is possible toadjust the standards III vertically and the standards II2 horizontally.The clamp II! also provides for transverse adjustment on the tool barsupport 5|. From this description it is obvious that a simple four-rowcultivator of the knife weeder type has been formed, and it is alsoevident that other types of tools may be used to replace the knifeweeder attachment for cultivating. The adjustment of the cultivatorattachment for cultivating depth is adjusted by means of the levers I6.In raising and lowering the cultivator attachment, the operator tripsthe lever I6 of the power lift mechanism to raise or lower theattachment in the same manner as the planter attachment frame is raisedand lowered. Further adjustment of the tool bar supporting frame 50 maybe had by adjusting the lever 60.

It is apparent from the description that a very simple rear mountedtractor planter construction, and also four-row tractor cultivator havebeen described. The planter units and cultivator attachment are closelycoupled to the rear of the tractor, so that the raising and lowering ofthe front end of the tractor do not 31- feet the depth of planting. Avery simple drive mechanism has been provided for the hopper dispensingmechanisms, and a simple means has been provided for throwing the hopperdrive mechanisms in and out of operation as the tool bar supportingframe is raised or lowered. In addition, a simple means of adjustmenthas been provided for finely adjusting the planting depth or cultivatingdepth of the respective ground engaging tools of theplanter attachment,and the cultivator attachment. Also, a power lift mechanism has beenprovided, which is operated from the motor of the tractor for raisingand lowering the tool bar supporting frame. The connections for mountingthe planter attachment are 5 such that the planter attachment may bereadily connected to and disconnected from the tractor by the removal ofa few parts, leaving the tractor with its standard draw-bar ready to beconnected to other types of tools and ready to be trailed from thedraw-bar.

In the construction described and illustrated, the tool bar supportingframe is counterbalanced by counterbalancing springs I22 to aid theoperator in adjusting the toolbar supporting frame vertically. Thecounterbalancing springs I22 are connected-at their rear ends to aspring bracket I23 securedto the bar 52 intermediate the ends thereof,and at its forward end the counterbalancing spring is adjustablyconnected to the adjusting lever I6 by an adjusting screw I23 andbracket I24. With this counterbalancing mechanism or means, it isobvious that the effort exerted by the operator in adjusting the toolbar supporting frame 50 is reduced to a minimum.

To detach the planter from the tractor, the

lifting chains III are disconnected with the tool bar supporting framein its ground engaging position and the pins 58, 58' are removed, andthe tractor driven away, after the links 68 have been detached from thelifting arms 61. The adjusting lever 60 may or may not be removed, but,if it is to be removed, only the lower bolt in the plate members 64 needbe detached, allowshaft 90 and its corresponding parts may be readilydetached, if necessary. The lifting links 49 from the power take-offrock-shaft should next be discontinued. It is obvious that thetransversely extending support 22 may! be readily moved after the braceshave been disconnected. The power lift-mechanism may or may not bedisconnected, depending upon whether it is to be connected to othertools. It is obvious that the planter attachment may be connected to thetractor in the reverse order. It is apparent from the description of thedetaching and attaching 40 operations that a planter attachment end acultivator attachment have been provided, which may be readily attachedto and detached from a tractor in the shortest possible time.

While the construction above described exem- 45 plifies one preferredform of the invention, it will be obvious to those skilled in the artthat certain modifications in the structure are possible withoutdeparting from the scope of the invention as defined in the followingclaims.

What is claimed as new is:

1. The combination with a tractor having a draw-bar and a. power liftdevice, of-a lister plow directly and pivotally connected to thetractor, means for converting the lister plow into a lister 55 plantercomprising means for holding the vdrawbar in a rearwardly extendedposition, means adapted to be attached to said draw-bar for supportingseed hopper devices and having levers attached thereto, seed hopperdevices and drive 0 means therefor, seed boot devices attached to theplow, means for connecting the power lift to the plow including saidlevers to effect raising and lowering of the plow.

2. The combination with a tractor having a 65 draw-bar and a power liftdevice, of a lister plow directly and pivotally connected to thetractor, means for converting the lister plow into a lister plantercomprising means for holding the drawbar in a rearwardly extendedposition, means adapted to be attached to said draw-bar for supportingseed hopper devices and having levers attached thereto, seed hopperdevices and drive means therefor including a clutch, and means fordisengaging" the clutch upon operation of the 7 power lift to preventdropping of the seeds when and lowering of the plow.

the plow is raised, seed boot devices attached to the plow, means forconnecting the power lift to the plow including said levers to effectraising 3. The combination with atractorhaving a draw-bar and a powerlift device, of a lister plow directly and pivotally connected to thetractor and having a. lever mounted thereon, means for converting thelister plow' into a lister planter comprising means for holding thedraw-bar in a rearwardly extended position, a seed hopper supportingmember attached to the draw-bar, a. lever carried by the supportingmember, a. seed hopper device and drive means therefor, a seed-bootdevice attached to the plow, means for connecting the power lift to theplow including both mentioned levers to effect raising and lowering ofthe plow, and means for adjusting the first mentioned lever to regulatethe planting depth.

4. In combination, a tractor including a rear axle, a power lift device,a ground working tool.

a vertically swinging pivot for attaching the forward end of said toolto the tractor ahead of the rear axle, an angularly adjustable leverpivotally mounted on said tool, means for connecting the power liftdevice to said lever, manual means for adjusting the angular position ofthe lever relative to the tool to effect a regulation of the workingdepth of the tool, said manual means being located ahead of the rearaxle, and means for adjusting the swinging pivot to maintain thecorrect. line of draft of the tool.

5. In combination with a tractor having a power lift device, a groundworking tool frame comprising a longitudinally extending draft memberhaving a rear portion, a brace member forming a V with the rear portionof the draft member to diverge rearwardly therewith, and a tool supportbar fixed near the rear ends of both said members at a location removedfrom the bottom of the V to provide a rigid construction of theassembled members, working tools attached to said bar, the ends of saidmembers extending rearwardly of the fixed bar member, and meansassociated with said ends of said members for connecting the tool bar tothe power lift device for raising and lowering the tool frame.

6. In combination with a tractor having a power lift, device, a groundworking tool frame 'comprising a longitudinally extending. draft memberhaving a rear portion, a brace member forming a V with the rear portionof the draft member to diverge rearwardly therewith, and a tool supportbar secured near the rear ends of both said members at a locationremoved from the bottom of the V to provide a rigid construction of 'theassembled members, working tools attached tosaid bar, a rock-shaftmounted for rotation between the draft and brace members a lever fixedto the rock-shaft, means for connecting the power lift device to saidlever, and means for adjusting the angular position of the rock-shaftand lever relative to the draft member to effect a regulation of theworking depth of the tools.

7. In combination, a tractor having a rear axle and a power lift device,a draft bail pivotally connected to the tractor for vertical adjustmentahead of the rear axle, a direct connected groundworking implementhaving its forward end pivotally connected to the draft bail, anangularly adjustable lever pivotally mounted at the rear end of theimplement, means for connecting the lever to the power lift device,manual means for adjusting the lever relative to the connecting meanswith the power lift device, said manual means being located ahead of thetractor rear axle, and means for adjusting the draft bail to maintainthe correct line of draft of the implement.

8. 'I'he combination with a tractor having an 7 operator's. station anda rear axle structure, a

transversely extending frame secured to the tractor to the rear of therear axle structure.

an implement frame positioned below the transversely extending frame andadapted to be ad- 'justed vertically with respect thereto, a draft bailmounted for vertical adjustment on the tractor ahead of the rear axlestructure for connecting the implement frame to the tractor, manualmeans for'adjusting the draft bail on the tractor ahead of the rear axlestructure and within reachof the operator's station, means mounted onthe implement frame adapted to be adjusted in a vertical plane, andmanually actuated means for adjusting said last mentioned means mountedon said implement frame ahead of said frame, a pair of lever devicestransversely spaced with respect to each other on said tool frame, meansfor connecting. the devices ,with the power lift device. and separatemanual means for each lever device to adjust the angular position of thesame for regulating the working depth of said tools, the said respectivemanual means being located ahead of the rear axle structure.

JAMES L. HIPPLE. 20

